Uh... I have not seen a BIOS update from my MB manufacturer in...oh...a year....maybe?

A new flaw has been disclosed that impacts most Intel 6th and 7th Generation Skylake and Kaby Lake-based processors that support HyperThreading, and reportedly exists across all operating systems. The issue was just disclosed on the Debian Linux user list and sent out with a warning notification, but again, this issue affects all OSes beyond just Linux.